Brake drum



March 5, J. R- CAUTLEY I BRAKE'DRUM Original Filed March l1. 1924 lNvENToR JOHN R.CAUTLEY ATTORNEY Patented ll/lar, 5, 192

Fri

r n l TUHH R. CAUTLEY, OF SOUTH BEND, NDANA, ASSIGNOR T@ BENDIX BRAKE CM- PANY, OF CHICAGO, KLLENIS, A. CRPRATXON @F LLINOLS.

@riginal application led March 1l,

This invention relates to brake drums, and one object is to provide a strong and eicient drum which may, if desired, be pressed out of relatively' light metal. ln

5 one desirable arrangement,`the cylindrical breaking dange is reinforced against distortion by a separate member', shown as a hoop, which encircles it, and which is preferably `formed with flanges serving as heatlo radiating ribs.

rllhe above and other objects and features of the invention will be apparent from the following description of two illustrative einbodiments shown in the accompanying drawings, in which:

lfigs. l and 2 are diametrical sections through two brake drums, each of which embodies one modification of my invention.

lin each arrangement, the drum l0 (Fig, l) and l2 (Fig. 2) is pressed from relatively light sheet metal. rllhe drum 10 is pressed to form an edge ange 14, which somewhat reinforces it yand which serves to some eX- tent as ,a heat-radiating rib or fin. This flange is also easily machined coaxially of the drum to form a close joint, almost watertight, with an encircling flange on a backing plate. lEach drum has a cylindrical backing flange lli.

Ordinarily a drum of this character is too weak, being easil distorted outwardly by the bralre shoes. o prevent this, l provide each drum with a hoop 18 or 20 or an equivalent encircling reinforcing member, ,which may be heated to slip over the flange 16 of the drum, and then allowed to shrink onto the dange, where it may be spotwelded or otherwise secured as indicated at 21, Member i8 is channel-shaed in cross-section, and member 20 is in i: form of a plurality of channels, in either case providing a plurality of outwardly projecting Hanges serving as heat-radiating ribs or fins and also 19%, Serial to. 698,463,-Y Divded and this application filed July 6, i925. Serial No. 41,550,

serving additionally to reinforce the drum. While two illustrative embodiments of the invention have been described in detail, it i is not my intention to limit its scope to those particular' embodiments, or otherwise than by the terms of the appended claims. The present application is a division of my application No. 698,463, filed March il, 1924.

ll claim: f.

l. A brake drum generally cup-shaped in form and having a substantially cylindrical braking flange, and a separate part channelsliaped in cross-section encircling, carried by and fused to said flange and reinforcing it against distortion and arranged with outwardly projecting flanges serving as heatradiating ribs.,

2. A brake drum having a substantially cylindrical braking Harige and a separate hoop encircling and carried by said ange and reinforcing it against distortion, the hoop being of such diameter as to be forced over the iiange after the drum is formed and being a close fit over `said Harige to be in intimate compressed engagement therewith throughout., y

3. A pressed metal brake drum generally cup-sbaped and having a substantially cylindrical braking flange, and a cylindrical separate hoop encircling and carried by said iange and fused thereto and reinforcing it A against distortion and formed with a plurality of parallel outwardly projecting flanges serving as heat-radiating ribs and additionally reinforcing said flange.

4:. A pressed metal brake drum generally cup-shaped and having a substantially cylindrical braking flange, and a separate reinforcing annulus shrunk over said flange and fused thereto.

ln testimony whereof l have hereunto signed my name.

JHN R. CAUTLEY. 

